Blue Tansy Essential Oil

Tanacetum annuum is often confused with common tansy (Tanacetum vulgare) but the former produces an essential oil that is completely different chemically as it contains no thujone and high amounts of chamazulene making the oil dark blue in color, giving rise to it common name of Blue Tansy Oil.  Despite claims by some unethical resellers of essential oils who adulterate the very expensive Blue Tansy (Tanacetum annuum) oil with the much cheaper oil from Tanacetum vulgare, it should be noted that the oil from Tanacetum vulgare is never blue in color as it contains no chamazulene.[ For this reason a high thujone oil from Tanacetum vulgare should never be referred to as “Blue Tansy” oil and any such blue oil containing significant thujone is an adulterated product.